Spark-arrester



(No Model.)

J. HULS (in T. J. UHISM.

SPARK ARREST-ER. No 806,886. Patented Oct 7, 1884.

WITNESSES 4 w mm 10/? nrrnn tarts arn'r rrrcn.

SPARK ARRESTER.

SPECIFICATION forming part of Letters Patent No. 306,336, dated October7, 1884.

Application filed March 4, 1884.

To all whom it may concern:

Be it known that we, J osErH HULs and THOMAS J. GHIsM, citizens of theUnited States, residing at Albion, in the county of Edwards and State ofIllinois, have invented certain new and useful Improvements in Spark-Arresters, of which the following is a specification, reference beinghad therein to the accompanying drawing.

Our invention relates to improvements in spark-arresters, and has forits object the preventing of the escape of sparks from the smokestack ofan engine or locomotive, and also provide a means whereby the screen maybe opened when it is necessary to drive the sweat or damp from the fluesof the boiler.

The figure in the drawing represents a vertical section through asmoke-stack containing our improvements.

A represents a smoke-stack of usual construction surmounted by theflaring hood 1%, which carries a narrow pan or check, 0,10- cated aboutcentrally on the inside of the hood. This pan is circular in form, tocorrespond to the shape of the hood, and has its inner edge turned up,for the purpose hereinafter set forth.

D represents a wire-gauze screen in the form of along truncated cone andforming the sparkarrester proper. The upper part of the screen issecurely fastened to a collar, E, which may or may not have a greaterflare than the screen, and has its upper edge turned outward anddownward, and adapted to fit over the upwardproiecting edge of the hoodB. The collar may be fastened to the hood by rivets or other convenientmeans, and it thus forms a support for the downwardly projecting screen.The bottom of the gauze screen is fastened to a collar, F, the loweredge of which is bent inward and upward, to form a valve seat for thevalve G, which is hinged to one side of the collar F. This valve hashinged to its center the rod H projecting upward, and being connected toone end of the lever I, which is pivoted to a suitable fulcrum on oneside of the collar E. From the other end of the lever depends the rod K,the lower end of which is adapted to engage with a catch, L, fastened tothe outside of the stack.

(N0 model.)

It is evident that when sparks are forced into the stack by the blastthat as they cannot escape through the gauze screen they ascend till,reaching the collar E, they are rebounded into the pan 0, where they areretained.

As was heretofore referred to, when it is desired in starting up, andbefore putting on the blast, to drive out the sweat in the fines, aclear opening is wanted in the stack. and then the valve is opened bymeans of the lever attachment. Afterward, when the blast is put on, itis necessary to close the valve, in order to prevent the escape of thesparks.

Having thus fully described the device, what we claim, and desire tosecure by Let ters Patent, is

1. A detachable spark-arrester of the shape shown and described, beingprovided at its lower end with a valve operated by suitable mechanism,and being adapted to be inserted in a smokestack and fastened thereto,sub stantially as described.

2. The combination, with a spark-arrester, of the valve hinged to itslower end and operated by a lever and its connections, all being securedto and carried by the said spark-arrester, substantially as described.

3. The combination, with a smoke-stack, of a detachable spark-arrester,shaped as described and shown, and consisting of a wiregauze screensecured at its upper end to a supporting-collar and at its lower endcarrying a collar which forms a valve-seat, substantially as described.

4. The combination, with the smoke-stack, of the wire-gauzesparkarrester, having a supporting-collar at one end and at the other acollar carrying a valve operated by suitable mechanism, and the circularflanged pan fastened to the inside of the hood of the smokestack,substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOSEPH HULS. THOMAS J. OHISM.

Witnesses:

GEORGE HARRIS, TILLIAM R. STRAWN.

